JP2013522119A - Ship propulsion device and ship equipped with the same - Google Patents

Abstract

A marine vessel propulsion apparatus and a marine vessel provided with the same are provided.
A marine vessel propulsion device according to an embodiment of the present invention includes a tunnel unit, a propeller that rotates inside the tunnel unit to generate propulsive force, and has an ejection fluid discharge port provided at an end, and the propeller rotates. So that a jet fluid layer is formed between a driving unit that provides a driving force for driving, a shaft system that transmits the driving force of the driving unit to the propeller, and an end of the propeller and an inner wall of the tunnel unit. An ejection fluid supply section for supplying the ejection fluid to the ejection fluid discharge port.
[Selection] Figure 1

Description

  The present invention relates to a marine vessel propulsion device and a marine vessel equipped with the same.

  In the case of a marine propulsion device in which a propeller is arranged inside the tunnel portion like a side thruster and generates propulsive force, in order to avoid interference between the propeller and the tunnel portion, the propeller is placed between the end portion of the propeller and the tunnel portion. A gap is formed.

  In the conventional marine propulsion device formed in this way, the fluid located inside the tunnel portion is not completely accelerated by the propeller, but part of it moves through the gap, and the propulsion efficiency is reduced. There was a problem.

  Further, the conventional marine propulsion device has a problem that vibration noise generated in the end of the propeller is transmitted to the tunnel portion through the gap, thereby increasing vibration noise in the hull.

  An object of the present invention is to provide a marine vessel propulsion device that is improved in propulsion efficiency and is configured to reduce vibration and noise of the hull, and a vessel equipped with the same.

  According to one aspect of the present invention, there is a marine propulsion device, a propulsion unit that generates a propulsive force by rotating inside the tunnel unit and the tunnel unit, and is provided with an ejection fluid discharge port at an end portion, A drive unit that provides a driving force for rotating the propeller, a shaft system that transmits the driving force of the driving unit to the propeller, and an ejection fluid layer between an end of the propeller and an inner wall of the tunnel unit A marine vessel propulsion device is provided that includes a jet fluid supply unit that feeds jet fluid to the jet fluid discharge port.

  The propeller includes a propeller hub, and a plurality of propeller blades that are spaced apart from each other on the outer peripheral surface of the propeller hub and provided with the ejection fluid discharge port at an end, and the shaft system includes the hub The injection fluid supply unit includes a pump for pumping the injection fluid, and an injection fluid passage unit for moving the injection fluid pumped by the pump to the injection fluid discharge port. be able to.

  The jet fluid passage portion extends from the inside of the propeller hub to the jet fluid discharge port of the propeller, extends in the longitudinal direction inside the main shaft, and communicates with the propeller passage portion. A main shaft passage portion, and a pump-main shaft passage portion that extends from the jet fluid pump to the main shaft passage portion and communicates with the main shaft passage portion.

  The pump-spindle passage portion has a branch passage portion extending in a radial direction of the spindle from the spindle passage portion to an outer peripheral surface of the spindle, and a predetermined region of the spindle provided with the branch passage portion in a circumferential shape. And an intermediate passage portion that communicates with the branch passage portion and a main passage portion that extends from the jet fluid pump to the intermediate passage portion.

  According to another aspect of the present invention, a ship including a hull and the propulsion device provided in the hull is provided.

  The propulsion device can be used as a side thruster.

  The propulsion device can be used as an azimuth thruster.

  According to the embodiment of the present invention, since the jet fluid layer is formed between the propeller and the tunnel portion, the vibration generated by the propeller is interrupted by the jet fluid layer and is not transmitted to the tunnel portion, and the vibration of the hull Stuttering can be reduced.

  In addition, the jet fluid layer generated between the propeller and the tunnel portion fills the space between the propeller and the tunnel portion, so that the fluid inside the tunnel portion does not escape from between the propeller and the tunnel portion. It is fully accelerated, which can improve propulsion efficiency.

  Further, since the jet fluid is jetted from the end of the propeller to form the jet fluid layer, the jet fluid moves together with the fluid accelerated by the propeller without causing interference with the surface of the propeller blades that generate propulsive force, Thereby, propulsion efficiency can be maintained.

It is drawing which shows roughly the cross section of the propulsion apparatus for ships which concerns on one Example of this invention. 1 is a schematic view illustrating a jet fluid passage portion included in a propulsion device according to an embodiment of the present invention. It is drawing which shows the cross section of AA of FIG. FIG. 3 is a drawing schematically showing a cross section taken along line BB in FIG. 2. It is drawing which shows the cross section of CC of FIG. FIG. 3 is a drawing schematically showing a cross section taken along line DD of FIG. 2. It is drawing which shows roughly the usage example of the propulsion apparatus which concerns on one Example of this invention. It is drawing which shows schematically the other usage example of the propulsion apparatus which concerns on one Example of this invention.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, and the same or corresponding components will be denoted by the same or corresponding drawing numbers in order to explain the same. A duplicate description is omitted.

  FIG. 1 is a schematic view showing a marine vessel propulsion apparatus according to an embodiment of the present invention. Referring to FIG. 1, the propulsion device 1 according to this embodiment includes a tunnel unit 10, a propeller 20, a drive unit 30, a shaft system 40, and a jet fluid supply unit 50. In such a propulsion device 1, the jet fluid supplied by the jet fluid supply unit 50 is jetted through the end of the propeller 20, and a bubble is formed between the end of the propeller 20 and the inner surface of the tunnel unit 10. By doing so, the propulsion efficiency is improved and the vibration noise of the hull is reduced. Here, the jet fluid can include air or water.

  In more detail, the tunnel part 10 provides the movement path | route of the fluid which produces a driving force. The tunnel part 10 may be a part of the hull, or may be an appendage coupled to the hull. A propeller 20 is disposed inside the tunnel unit 10. The propeller 20 rotates inside the tunnel portion 10 and generates a propulsive force. When the propeller 20 rotates, the internal fluid of the tunnel portion 10 is accelerated, and a propulsive force is generated from the process in which the fluid is accelerated.

  Propeller 20 includes a propeller hub 21 and a plurality of propeller blades 22 arranged on the outer peripheral surface of propeller hub 21 so as to be spaced apart from each other. A jet fluid discharge port 23 is provided at the end of the propeller blade 22.

  The propeller 20 is rotated by the driving force provided from the driving unit 30. The driving unit 30 can include a motor and the like. The driving force generated by the driving unit 30 is transmitted to the propeller 20 by the shaft system 40. The shaft system 40 can include a main shaft 41 coupled to the propeller hub 21. The shaft system 40 can further include an auxiliary shaft 42 interposed between the main shaft 41 and the drive unit 30. The auxiliary shaft 42 may be directly connected to the driving unit 30 or may be connected to the driving unit 30 through another shaft (not shown). The main shaft 41 and the auxiliary shaft 42 can be connected by a worm gear. The main shaft 41 and the auxiliary shaft 42 can be rotatably supported by a bearing (not shown).

  The propulsion device 1 according to the present embodiment includes a jet fluid supply unit 50. The jet fluid supply unit 50 supplies jet fluid to the jet fluid discharge port 23 of the propeller 20 so that bubbles are formed between the end of the propeller 20 and the inner surface of the tunnel unit 10.

  According to the present embodiment as described above, a jet fluid layer is formed in a space between the end portion of the propeller 20 and the inner surface of the tunnel portion 10 (hereinafter referred to as a separation space), and thus is generated by the propeller 20. The generated vibration is interrupted by the jet fluid layer and is not transmitted to the tunnel portion 10, and the vibration noise of the hull can be reduced. In this case, it is preferable that the jet fluid includes air.

  Further, since the jet fluid layer fills the separation space, the fluid inside the tunnel portion 10 can be completely accelerated by the propeller 20 without passing through the separation space, thereby improving the propulsion efficiency. Can be improved. In this case, it is preferable that the jet fluid includes water.

  Further, the jet fluid is jetted from the end of the propeller 20 to form the jet fluid layer, so that the jet fluid is accelerated by the propeller 20 without causing interference with the surface of the propeller blade 22 that generates propulsive force. It moves with the fluid, and thus propulsion efficiency can be maintained.

  The ejection fluid supply unit 50 includes a pump 51 that pumps the ejection fluid, and an ejection fluid passage 52 that moves the ejection fluid generated by the pump 51 to the ejection fluid discharge port 23. The pump 51 can pump the jet fluid from a jet fluid storage (not shown).

  FIG. 2 is a drawing schematically showing a cross section of a jet fluid passage portion included in a propulsion device according to an embodiment of the present invention, and FIG. 3 is a schematic cross section taken along line AA of FIG. 4 is a drawing schematically showing a cross section taken along line BB in FIG. 2, FIG. 5 is a drawing schematically showing a cross section taken along line CC in FIG. 2, and FIG. FIG. 3 is a drawing schematically showing a cross section taken along line DD of FIG. 2.

  Below, with reference to FIG. 2 thru | or FIG. 6, the jetting fluid channel | path part 52 which concerns on a present Example is demonstrated in detail.

  The jet fluid passage portion 52 can include a propeller passage portion 53, a main shaft passage portion 54, and a pump-main shaft passage portion 55. The propeller passage portion 53 can extend from the inside of the propeller hub 21 to the jet fluid discharge port 23. In this case, the propeller passage portion 53 provided in the propeller blade 22 is extended inside the propeller blade 22. The main shaft passage portion 54 extends in the longitudinal direction inside the main shaft 41 and can be connected to the propeller passage portion 53. The pump-main shaft passage portion 55 extends from the jet fluid pump 51 (see FIG. 1) to the main shaft passage portion 54 and communicates with the main shaft passage portion 54. The jet fluid generated by the pump 51 (see FIG. 1) is transmitted to the jet fluid discharge port 23 provided in the propeller blade 22 through the pump-main shaft passage portion 55, the main shaft passage portion 54, and the propeller passage portion 53 sequentially. Is done.

  According to the present embodiment, the pump-main shaft passage portion 55 can include the branch passage portion 55a, the intermediate passage portion 55b, and the main passage portion 55c.

  The branch passage portion 55 a extends in the radial direction of the main shaft 41 from the main shaft passage portion 54 to the outer peripheral surface of the main shaft 41.

  The intermediate passage portion 55b surrounds a predetermined region of the main shaft 41 where the branch passage portion 55a is formed, and communicates with the branch passage portion 55a. In order to provide such an intermediate passage portion 55 a, the propulsion device according to this embodiment can include a housing 60 provided on the outer peripheral surface of the main shaft 41.

  The housing 60 surrounds a predetermined region of the main shaft 41 where the intermediate passage portion 55b is formed. A space portion that defines the intermediate passage portion 55b is formed inside the housing 60 that surrounds the main shaft 41. The housing 60 may be coupled to the main shaft 41 such that the main shaft 41 is rotatable with respect to the housing 60. In this case, the housing 60 is supported by a support member (not shown) of the housing and can be fixed in position.

  The intermediate passage portion 55b communicates with the main passage portion 55c. The main passage portion 55c extends from the jet fluid pump 51 (see FIG. 1) to the intermediate passage portion 55b.

  In order to prevent the jet fluid from leaking from the intermediate passage portion 55b in the longitudinal direction of the main shaft 41, the seal members 70 may be arranged on both sides with the intermediate passage portion 55b as the center. The seal member 70 is interposed between the housing 60 and the main shaft 41.

  The pump-main shaft passage portion 55 configured as described above can effectively transmit the jet fluid generated by the jet fluid pump 51 (see FIG. 1) to the main shaft passage portion 54 even while the main shaft 41 is rotating. it can.

  According to the present embodiment, the propulsion device 1 can further include a casing 80 that covers a part of the shaft system 40 and a part of the jet fluid passage portion 52, as shown in FIG. The casing 80 protects the shaft system 40 and the jet fluid passage portion 52 and supports the propeller 20 and the like with respect to the tunnel portion 10.

  The propulsion device 1 according to the present embodiment described above is used for ships. For example, the propulsion device 1 according to the present embodiment can be used as a side thruster. In this case, as shown in FIG. 7, the propulsion device 1 generates a propulsive force in the width direction of the hull 5 (left and right in FIG. 7). Here, the tunnel portion 10 of the propulsion device 1 is extended in the width direction of the hull 5 and can be formed to constitute a part of the hull 5. In this case, the drive unit 30, the pump 51, and the like constituting the propulsion device 1 can be disposed inside the hull 5.

  Or the propulsion apparatus 1 which concerns on a present Example can be used as an azimuth thruster, as shown in FIG. In this case, the propulsion device 1 can generate a propulsive force in all directions on the horizontal plane. Here, since the mechanism for generating the propulsive force in all directions on the horizontal plane is the same as that of the azimuth thruster, the description thereof is omitted. When the propulsion device 1 is used as an azimuth thruster, the tunnel portion 10 may be limited by the duct 6, for example. The duct 6 may be coupled to one side of the casing 80 coupled to the hull 5. In this case, the drive unit 30, the pump 51, and the like constituting the propulsion device 1 may be disposed inside the hull 5.

  Although the embodiment of the present invention has been described above, the idea of the present invention is not limited to the embodiment presented in this specification, and those skilled in the art who understand the idea of the present invention can configure the structure within the scope of the same idea. It will be understood that other embodiments can be easily proposed by addition, modification, deletion, addition, etc. of elements, and that these are also included in the spirit of the present invention.

Claims (7)

A marine propulsion device,
Tunnel part,
A propeller that rotates inside the tunnel portion to generate a propulsive force, and is provided with an ejection fluid discharge port at an end;
A driving unit for providing a driving force for rotating the propeller;
A shaft system for transmitting the driving force of the driving unit to the propeller;
An injection fluid supply unit that supplies an injection fluid to the injection fluid discharge port of the propeller, such that an injection fluid layer is formed between an end of the propeller and an inner wall of the tunnel unit;
A marine vessel propulsion device comprising: The propeller is
With a propeller hub,
A plurality of propeller blades disposed at an outer peripheral surface of the propeller hub and provided with the ejection fluid discharge port at an end thereof, and the shaft system includes a main shaft coupled to the hub,
The jet fluid supply unit is
A pump for pumping the jet fluid;
The marine vessel propulsion device according to claim 1, further comprising: an ejection fluid passage portion that moves the ejection fluid pumped by the pump to the ejection fluid discharge port. The jet fluid passage portion is
A propeller passage extending from the inside of the propeller hub to the ejection fluid discharge port;
A main shaft passage portion extending in a longitudinal direction inside the main shaft and communicating with the propeller passage portion;
The marine vessel propulsion device according to claim 2, further comprising a pump-main shaft passage portion that extends from the jet fluid pump to the main shaft passage portion and communicates with the main shaft passage portion. The pump-spindle passage section is
A branch passage portion extending in a radial direction of the main shaft from the main shaft passage portion to an outer peripheral surface of the main shaft;
An intermediate passage portion surrounding a predetermined region of the main shaft provided with the branch passage portion in a circumferential shape and communicating with the branch passage portion;
The marine vessel propulsion device according to claim 3, further comprising a main passage portion extending from the jet fluid pump to the intermediate passage portion. The hull,
The ship provided with the propulsion apparatus of any one of Claims 1-4 provided in the said hull.   The ship according to claim 5, wherein the propulsion device is used as a side thruster.   The ship according to claim 5, wherein the propulsion device is used as an azimuth thruster.

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